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<script>
    var i=prompt("被称为雪山之王的是下面哪种动物?                                                     A.牦牛 B.藏羚羊 C.芝士雪豹 D.藏狐")
    switch(i){
        case "A":
        alert("回答错误");break;
        case "B":
        alert("回答错误");break;
        case "C":
        alert("回答正确");break;
        case "D":
        alert("回答错误");break;
        default:
        alert("暂不支持");break;
    }
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